body {
    font-family: Arial, sans-serif;
    background: #eef2f7;
    margin: 0;
    padding: 20px;
}

h1, h2 {
    text-align: center;
    color: #003366;
}

.card {
    background: white;
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

button, .boton {
    background: #0066cc;
    color: white;
    padding: 12px 18px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    margin-top: 10px;
}

button:hover, .boton:hover {
    background: #004c99;
}

select, input {
    padding: 10px;
    width: 100%;
    border-radius: 6px;
    border: 1px solid #ccc;
    margin-bottom: 10px;
}